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Ink set

a technology of ink and set, applied in the field of ink sets, can solve the problems of unbalanced color tones of the entire image, further escalate fading and discoloration of images, and upset the color balance of an entire image, and achieve good ozone fastness

Active Publication Date: 2007-05-01
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an image does not deteriorate only due to the effect of light, but also due to oxidation caused by oxidizing gases in the environment (for example, ozone), which further escalates fading and discoloration of the images.
When the ozone fastness of a certain ink composition is remarkably inferior to that of the other ink compositions, colors formed with that certain ink composition fade or change earlier than the other colors, and the color tones of the entire image become unbalanced.
Bronzing may upset the color balance of an entire image and degrade the image quality.

Method used

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examples

[0206]The present invention is explained in further detail below, but is not limited to the following examples.

[Preparation of Each Ink Composition]

[0207]Based on the compositions shown in Tables 1 and 2 below, the respective components were stirred for 30 minutes at room temperature and the obtained solutions were filtered with 1.0 μm pore size membrane filters, thereby obtaining the respective ink compositions. In Table 1, the numeric value of each component indicates wt % where 100% is considered the total mass of the ink composition. “Residue” indicating an amount of water, refers to the amount that makes 100% in total with the amounts of the other components other than water.

[0208]In Tables 1 and 2, C represents a cyan ink composition, M represents a magenta ink composition, Y represents a yellow ink composition, K represents a black ink composition, LC represents a light cyan ink composition, and LM represents a light magenta ink composition.

[0209]In Tables 1 and 2, cyan dyes ...

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Abstract

To provide an ink set capable of recording images with good ozone fastness on a recording medium, an ink set of the present invention comprises at least a yellow ink composition, a magenta ink composition, and a cyan ink composition. The cyan ink composition contains at least one of the compounds expressed by formula (1) below as a cyan dye:and the magenta ink composition contains, as a colorant, at least one substance selected from the group consisting of compounds expressed by formula (2) below:and salts thereof(in formula (2), A represents an alkylene group, an alkylene group containing a phenylene group, or a group expressed by formula (3) below:and X represents a group selected from the group consisting of NH2, OH, and Cl).

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an ink set, particularly to an ink set capable of forming images with excellent ozone fastness.[0003]2. Description of Prior Art[0004]In recent years inkjet recording methods have been receiving attention. An inkjet recording method is a printing method whereby ink compositions are jetted as droplets and adhered to a recording medium such as paper. The method has the advantage that, with relatively inexpensive apparatus, high-resolution and high-quality images can be printed at high speed. Ink-jet recording apparatuses employing this method have gained wide market acceptance for their excellent print quality, low cost, relatively quiet performance and excellent graphic-forming capability. Among such inkjet recording apparatuses, a thermal (Bubble Jet (registered trademark)) printer and a piezoelectric drop-on-demand printer, in particular, have been commercially successful and widely use...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C09D11/02B41J2/01B41M5/00C09B5/14C09B29/42C09B47/24C09D11/00C09D11/326C09D11/38C09D11/40
CPCC09D11/328C09D11/40Y10T428/24802
Inventor OKI, YASUHIROKITAMURA, KAZUHIKOAOYAMA, TETSUYAHANMURA, MASAHIROFUKUMOTO, HIROSHI
Owner SEIKO EPSON CORP
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